C#: Check whether a given substring is present in the given string

Last update on December 20 2024 12:44:01 (UTC/GMT +8 hours)

Write a C# Sharp program to check whether a given substring is present in the given string

Sample Solution:-

C# Sharp Code:

using System;

// Define the exercise14 class
public class exercise14
{
    // Main method - entry point of the program
    public static void Main()
    {
        string str1, str2; // Declare two string variables to store input
        bool m; // Declare a boolean variable to store the result of substring search

        // Prompt the user for input
        Console.Write("\n\nCheck whether a given substring is present in the given string :\n");
        Console.Write("-------------------------------------------------------------------\n");
        Console.Write("Input the string : ");
        str1 = Console.ReadLine(); // Read the input string from the user

        Console.Write("Input the substring to search : ");
        str2 = Console.ReadLine(); // Read the substring to search from the user

        m = str1.Contains(str2); // Check if str1 contains str2, stores the result in boolean variable 'm'

        // Check if the substring exists in the string and output the result
        if (m) // If 'm' is true, the substring exists in the string
            Console.Write("The substring exists in the string.\n\n");
        else // If 'm' is false, the substring does not exist in the string
            Console.Write("The substring does not exist in the string.\n\n");
    }
}

Sample Output:

Check whether a given  substring is present in the given strig :       
-------------------------------------------------------------------    
Input the string : Welcome to w3resource.com                           
Input the substring to  search : w3resource                            
The substring exists in the string.

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